本文介紹了在 __init__ word=self.search_box.text AttributeError: 'NoneType' 對象沒有屬性 'text'的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
我正在制作一個應用程序.據我所知，我做的事情正確，但仍然出現此錯誤
I am making an application.as far as I know I am doing thingd correctly but still getting this error
word=self.search_box.textAttributeError: 'NoneType' 對象沒有屬性 'text'
word=self.search_box.text AttributeError: 'NoneType' object has no attribute 'text'
我已經檢查了拼寫錯誤和其他常見錯誤，但仍然無法正常工作.
I have checked for typos and other common mistakes still its not working.
這是代碼-
import kivy
kivy.require('1.10.0')
from kivy.uix.stacklayout import StackLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.app import App
from kivy.uix.popup import Popup
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivy.uix.textinput import TextInput
from kivy.properties import StringProperty
import json
Builder.load_file('VocabularyJournal.kv')
class MenuPage(Screen):
pass
class DisplayPage(Screen):
search_box= ObjectProperty()
label_maening=StringProperty()
label_synonym=StringProperty()
label_ant=StringProperty()
label_sentence=StringProperty()
def __init__(self, **kwargs):
super(DisplayPage,self).__init__(**kwargs)
with open('vocab_words.json') as rfile:
data=json.load(rfile)
word=self.search_box.text #the error occurred here
for value in data:
if value['word']==word:
self.label_maening=value['meaning']
self.label_synonym=value['synonym']
self.label_ant=value['antonyms']
self.label_sentence=value['sentence']
class WordInsertPage(Screen):
pass
class NewWordPage(Screen):
word_box = ObjectProperty()
meaning_box = ObjectProperty()
synonym_box = ObjectProperty()
ant_box = ObjectProperty()
sentence_box = ObjectProperty()
def saving_data(self):
with open('vocab_words.json') as rfile:
data=json.load(rfile)
entry={'word': self.word_box.text, 'meaning': self.meaning_box.text, 'synonym': self.synonym_box.text, 'antonyms': self.ant_box.text, 'sentence': self.sentence_box.text}
data.append(entry)
with open('vocab_words.json','w') as wfile:
json.dump(data,wfile,indent=4)
class FlashCard(Screen):
pass
class WordGroups(Screen):
pass
class Manager(ScreenManager):
pass
class VocabularyJournalApp(App):
def build(self):
return Manager()
object = VocabularyJournalApp()
object.run()
這是kv代碼-
<Manager>:
MenuPage:
name: 'menu'
WordInsertPage:
name: 'insertword'
NewWordPage:
name: 'newword'
FlashCard:
name: 'flashcard'
WordGroups:
name: 'wordgroup'
DisplayPage:
name: 'display'
<MenuPage>:
Label:
text: "Vocabulary Journal"
size_hint: .90,.10
StackLayout:
orientation: 'tb-rl'
spacing: 10
padding: 10
Button:
text: 'Search'
size_hint: None,.20
width: 130
background_down:'darkgrey.png'
on_press: root.manager.current='insertword'
Button:
text: 'New Word'
size_hint: None,.20
width: 130
background_down:'darkgrey.png'
on_press: root.manager.current='insertword'
Button:
text: 'Flash Cards'
size_hint: None,.20
width: 130
background_down:'darkgrey.png'
on_press: root.manager.current='flashcard'
Button:
text: 'Word Groups'
size_hint: None,.20
width: 130
background_down:'darkgrey.png'
on_press: root.manager.current='wordgroup'
<WordInsertPage>:
FloatLayout:
Button:
text: "New Word"
on_press: root.manager.current='newword'
font_size: 30
color: 0,0,0,1
size_hint: .2, .1
pos_hint: {"center_x": .5, "center_y": 0.3}
background_down: 'darkgrey.png'
Button:
text: "search word"
on_press: root.manager.current='display'
font_size: 30
color: 0,0,0,1
size_hint: .2, .1
pos_hint: {"center_x": .5, "center_y": 0.5}
background_down: 'darkgrey.png'
Button:
text: 'Flash Cards'
on_press: root.manager.current="flashcard"
font_size: 30
color: 0,0,0,1
size_hint: .2, .1
pos_hint: {"center_x": .5, "center_y": 0.7}
background_down: 'darkgrey.png'
<NewWordPage>:
id: refer_to_it
word_box: word_input
meaning_box: meaning_input
synonym_box: Synonym_input
ant_box: ant_input
sentence_box: sentence_input
StackLayout:
orientation: 'tb-rl'
spacing: 10
padding: 90
TextInput:
text: "write your word here"
color: 1,1,1,1
id: word_input
width: 300
size_hint: None, .10
TextInput:
text: "write meaning of your word here"
color: 1,1,1,1
id: meaning_input
width: 600
size_hint: None, .20
TextInput:
text: "write Synonyms of your word here"
color: 1,1,1,1
id: Synonym_input
width: 600
size_hint: None, .20
TextInput:
text: "write antonyms of your text here"
color: 1,1,1,1
id: ant_input
width: 600
size_hint: None, .20
TextInput:
text: "write a sentence based on your word here"
color: 1,1,1,1
id: sentence_input
width: 600
size_hint: None, .20
Button:
text: 'Save'
size_hint: None,.10
width: 130
background_down:'darkgrey.png'
on_press: refer_to_it.saving_data()
<DisplayPage>:
search_box: search_text # search_box is the reference to the textinput in py file
BoxLayout:
size_hint_y: None
height: '48dp'
TextInput:
text:'enter the word you wanna search here'
id: search_text
ToggleButton:
id: tog
text: 'Horizontal'
group: 'accordion'
state: 'down'
ToggleButton:
text: 'Vertical'
group: 'accordion'
Accordion:
orientation: 'horizontal' if tog.state == 'down' else 'vertical'
AccordionItem:
title:'meaning'
Label:
text: root.label_maening
text_size: self.width, None
AccordionItem:
title:'Synonym'
Label:
text: root.label_synonym
text_size: self.width, None
AccordionItem:
title:'Antonym'
Label:
text: root.label_ant
text_size: self.width, None
AccordionItem:
title:'Sentence'
Label:
text: root.label_sentence
text_size: self.width, None
推薦答案
這個問題是因為children沒有卡在parent的構造函數中，它稍后會卡住所以search_box在構造函數中會是None，解決方案是在 Clock 的幫助下完成構造函數后立即執行它:
the problem is caused because the children are not stuck in the constructor of the parent, it does it an instant later so search_box will be None in the constructor, the solution is to execute it an instant after finishing the constructor with the help of Clock:
from kivy.clock import Clock
class DisplayPage(Screen):
search_box= ObjectProperty()
label_maening=StringProperty()
label_synonym=StringProperty()
label_ant=StringProperty()
label_sentence=StringProperty()
def __init__(self, **kwargs):
super(DisplayPage,self).__init__(**kwargs)
Clock.schedule_once(self.callback)
def callback(self, dt):
with open('vocab_words.json') as rfile:
data=json.load(rfile)
word=self.search_box.text #the error occurred here
for value in data:
if value['word']==word:
self.label_maening=value['meaning']
self.label_synonym=value['synonym']
self.label_ant=value['antonyms']
self.label_sentence=value['sentence']
這篇關于在 __init__ word=self.search_box.text AttributeError: 'NoneType' 對象沒有屬性 'text'的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！
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